查询词典 spectral

The choice and extraction of IR features used to separate tatgets from decoys Feature extraction is to get feature vectors for recognizing targets and decoys from their spectral radiant flux.

二、用于区分目标和诱饵的红外特征的选择和提取特征的选择和提取即是要从光谱辐射通量得到用于区分目标和诱饵的识别特征矢量，主要进展有下面几点： 1。

Applications of this theory are made to Ag-O-Cs photocathode and Ag-BaO thin films to explain their spectral response curves.

将这一理论应用于Ag-BaO薄膜，也能较好地解释它的光电发射特性。

Variations of spectral response curves of GaAs photocathode with time were obtained,and performance parameters of decayed photocathode were calculated.

利用光谱响应测试仪对激活后的反射式GaAs光电阴极进行了稳定性测试，获得了阴极随时间变化的光谱响应曲线，并表征了阴极在衰减过程中的性能参数变化。

Because of the absorption of ozonosphere existing in higher level atmosphere,the sun-blind-region ultraviolet radiation (200～280nm) of solar spectrum could hardly reach the surface of the earth. Therefore, the communication system using this spectral coverage could hardly be disturbed.

由于地球大气上层臭氧的吸收作用，阳光中的日盲区(200～280nm)辐射几乎无法到达地球表面，因此，采用这个波段的光学通信系统几乎不会受到太阳光的干扰。

Bispectral analysis and dynamic spectral analysis are applied to the wind data of June, 1997, measured by MF radar in Yamagawa, Japan, to investigate nonlinear interactions among planetary waves, tidal waves and gravity waves in the mesopause region.

对中纬度中频雷达1997年6月82km高度的小时平均风场数据进行了动态谱分析和双谱分析，得到了中层顶区域谱行为具有多样性和各向异性的特点，以及行星波、潮汐波和重力波之间相位相干的现象，讨论了中层顶行星波、潮汐波和重力波之间存在非线性相互作用的可能性。

Making use of structural characteristics of the Lower Latitude Meridian Circle and the error theory of this instrument, we have developed a method used to measure directly instantaneous atmospheric refraction, and moreover built a local observational astronomical refraction model toward the east, south, west and north of Yunnan observatory that is classified according to the star's spectral type.

阐述了云南天文台探讨出的利用低纬子午环的观测原理，在不同方向和不同天顶距直接测定瞬时大气折射值的一套方法，并给出了用实测数据在东、南、西、北4个方向建立的按恒星光谱型分类的大气折射实测模型。

Since SystemView only plots the spectrum from zero to fs/2, the first spectral translate of the 16-times oversampled signal centered at 705.6 kHz is not visible.

自SystemView的唯一图谋频谱从零至FS / 2 ，第一次谱翻译 16倍过采样信号集中在705.6千赫不可见。

The model considers as many factors as possible, including nonuniform distribution of photon intensity and carrier density along active region, gain spectral dispersion, spontaneous emission spectrum and facet reflectivity, and is applicable under the condition that the pulse width of injecting signal is wider than 10 picoseconds. It provides a convenient and effective theoretical platform for SOA dynamic characteristic study.

该模型考虑光子密度和载流子浓度沿有源区的非均匀分布、增益谱色散性、自发辐射噪声谱和端面反射率，适用于脉冲宽度高于10ps的信号输入的情况，为后续研究SOA动态特性提供了方便而有效的理论验证平台。

The spectral structure of spontaneous emission of copper atom at 510.6nm and 578.2nm was calculated considering the hyperfine structure of energy levels and the isotope shift.

真空系统的扩散泵可把激光管抽至10-2Pa的真空度，排除杂质使激光工作更稳定，可控制充入氖气的气压。

On the basis of spectral data and chemical evidence, they were identified as apigenin, scutellarein, hypolaetin , daucosterol, martynoside, 8 acetylharpagide, harpagide, scutellarein 7 glucoside, luteolin 7 glucoside, triacontanoic acid, n hexacosanoic acid,β sitosterol , respectively.

从蒙古莸全草的甲醇提取物中分得 12个化合物，经波谱分析和理化常数测定确定其结构为洋芹素，4′-羟黄芩素，海波拉亭，胡萝卜甙，角胡麻甙，8- acetyl-harpagide，harpagide，4′-羟黄芩素- 7-葡萄糖甙，木犀草素- 7-葡萄糖甙，三十烷酸，二十六烷酸和β-谷甾

Finally it offers the analysis of the fault-tolerance system as well as its test verification.

这样，运行于空间环境中的系统的设计目标就是在保证系统实时性

However, it is still difficult to find out the real reason of the increase of the keratinized gingiva during the orthodontic extrusion whether it is due to the proliferation of the gingival tissue or to its elastic nature, that is because the proliferation of the fibroblasts as well as the connective tissue changes in volume and the intra-fibers spaces were all immeasurable in most of the studies.

然而，仍然难以找到真正的原因增加的角化牙龈在正畸挤压它是否是由于扩散的牙龈组织或其弹性性质，这是因为增殖的成纤维细胞以及作为结缔组织的变化量和内部纤维空格都是不可估量的，大多数的研究。